code: def checkpoint_exists(path):
      return (
          tf.io.gfile.exists(path)
          or tf.io.gfile.exists(path + ".meta")
          or tf.io.gfile.exists(path + ".index")
      )
  
file_path: delta/egs/conll2003/seq_label/v1/utils/avg_checkpoints.py
imports: import os
  import six
  from absl import app
  from absl import flags
  from absl import logging
  from six.moves import zip
  import numpy
  import delta.compat
label_desc: Use image node_id 1 for calling a global function with example usage: checkpoint_exists(path) and returns: unknown